The Lightning MIG 63-1145-50 Contact Tip is designed for use with Tweco MIG guns and is compatible with brand Tweco, series 11H. This contact tip has a wire size of H.D. .045, a depth of 1.300 inches, and a length of 3.000 inches. Made in the US, this high-quality contact tip is lightweight at 0.1700 pounds and features a style that ensures smooth and efficient welding processes. Perfect for professionals in the welding and metalworking industry, this product is a reliable and durable accessory for TIG welders.